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Diffusion of atomic hydrogen in ice-Ih

✍ Scribed by David M. Bartels; Ping Han; Paul W. Percival

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
530 KB
Volume
210
Category
Article
ISSN
0009-2614

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✦ Synopsis

We report new measurements ofEPR spin relaxation times TV and T2 for H atoms in hexagonal ice at -6 "C. We find T, = 23 f 3 ps, and T2= 6.9 k I .O ps at this temperature, in good agreement with expectation based on previous experiments. Motional correlation times have been calculated from these values and from previous T2 measurements for H and D atoms in isotopically mixed ice. The hopping rate deduced -2.8 x lOlo s-' near the crystal melting point, implies a diffusion rate of H atoms in ice nearly as fast as occurs in liquid water.

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